Edwin faulkner paddon



E, P. PADDON. PURNACB.

Patented May 24, 1892.

UNITED STATES PATENT OEEIYCE.

. EDWIN FAULKNER PADDON, OF LONDON, ENGLAND.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 475,603, dated May 24, 1892.`

Application filed August 31, 1891. Serial No. 404,261. (No model.) Patented in England J une 2,1890, No. 8,523, and in France April1, 1891, No. 212,491.

To a/ZZ whom t may concern/.-

Be it known that I, EDWIN FAULKNER PAD- DON, a subject of the Queen of Great Britain, residing at London, in the county of Middlesex, England, have invented a new and useful Improvement in Furnaces, (for which I have obtained a patent in Great Britain, No. 8,523, bearing date June 2, 1890, andin France, dated April 1, 1891, and numbered 212,491) of which the following is a specification.

My invention relates to improvements in furnaces of all kinds, and more especially to the furnaces of steam-boilers; and the objects of my improvements are, first, to effect the complete combustion. of the fuel in the furnace and the prevention o-f smoke, and, second, to provide means for the regulation of the quantity of air admitted or to shut it entrely off. I attain these objects by the means illustrated in the accompanying drawings, in

which- Figure 1 is a general view. of the entire apparatus. Fig. 2 is a plan; Fig. 3, an end view,` and Fig. l a transverse vertical section.

Similarletters refer to similar parts throughout the several views. n

h is a dead-plate, upon which the fuel 1s supplied in the usual Way through the firedoor, and a is a transverse opening or airspace extending across and through the deadplate b. This opening or air-space is not straight, but has its two opposite edges notched, the projecting part-s between the notches in the front edge entering into the notches in the back edge, and vice versa, but leaving a narrow continuous air-space between their ends and sides, the projecting parts tapering at their lower en ds so as to leave freerspaoe below for the admission of air.

The openin g or air-spacedthrough the deadplate b, as described, is snown formed by a separate serrated bar arranged and fixed by bolts to the front edge of the dead-plate'b, the projections and recesses in the bar and 1n the plate entering one another, as already described. Allowance may be made for eXpansion by heat. The inner edge of the bar may be without projections and notches.

Behind the continuons notched opening described and at a sufficient distance from the latter a second similar opening may be made in the same way through the dead-plate; or, instead of two, three or any desired number of such openings may be made.

On the inner side, in front of the transverse opening o, through the dead-plate b, a plate or feather c is arranged, inclining downward or outward toward the front of the furnace. This plate c turns upon pivots ff at its ends, and its position can be adjusted by the bar and handle g from the front of the furnace, so that the admission of air through the opening a can be regulated, or it can be entirely closed, as shown in Fig. 4.

The improved dead-plate niay be used with longitudinal fire-bars d of any of the ordinary kinds, as shown in the drawings, or with trans- .verse rocking or other fire-bars of the kind described in the Letters Patent of the United States of America granted to James George Galley, dated January 16, A. D. 1883, and numbered 270,582, or of other kinds, and it may be made in one piece or in two or more parts, as may be convenient.

Across the front or inner edge of the deadplate Z9 I make a continuous transverse shallow rib e, triangularin cross-section, the apex being uppermost and projecting for a short distance above the level of the dead-plate. This shallow rib serves as a guide t0 the attendant in supplying fuel, as it is necessary that the latter should be pushed forward beyond the rib e, in order to prevent the possibility of the air opening or passage a, being stopped. At the same time the trianglar section of the rib e prevents it from catching or preventing the free movement of the implements used in firing. Instead of being continuous, the rib described may have angular or other notches or spaces formed in its length.

The projections and notches which forni the transverse opening or passage a for air through the dead-plate Z9, as described and shown, instead of being made angular, may be rounded at their corners, so that the shape of the opening is more or less undulating or Waving in plan, as shown in dotted lines in Fig. 2.

Instead of one opening a, two or more may be used, and its shape and the shape, propor- IOO tions, and method of arrangementof the several parts may be varied more or less, as may be found convenient, to suitdierentcircumstances.

My present invention may be applied to furnaces of all kinds, and more especially to the furnaces of steam-boilers, and by its use perfect combustion of the coal or other fuel is promoted and the production of smoke prevented, While the apparatus is simple, cheap, and not likely to get out of order.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a furnace, the air space or channel a through the deadplate b, having its side notched or serrated or curved to receive corresponding projections upon the opposite side,

the air-space being left between them, substantially as described, and shown in the drawings. l

2. In a furnace, in a device for admitting air in front of the grate-bars, the combination, with a dead-plate b, having a serrated aperture a therein, and rib e beyond said aperture a, of a pivoted plate c, with means for altering the position of the saine, the said pivoted plate c being adapted to control the supply of air admitted through the aperture a, substantially as described.

3. In a furnace, in a device for admittinga regulated supply of air in front of the gratebars, the combination, with a dead-plate having a serrated aperture therein and an inclined rib in the rear of said aperture, of a pivoted plate adapted to wholly or partially l close said aperture, and a hand-rod connected to said pivoted plate, substantially as del scribed.

In testimony whereof I have hereunto set my hand in the presence of the two subscribing witnesses.

EDWIN FAULKNER PADDON.

Witnesses:

GEORGE HENRY HALLIWELL, ARTHUR ERNEST EDWARDS. 

